Lathe tool-holder.



J. W. HOUSBBERG.

LATHE TOOL HOLDER.

APPLICATION FILED MAR.15, 1911.

1,017,974. Patented Feb. 20, 1912.

WITNESSES INVENTOR Maw/Q 7. 26.44%!

UNITED s'rarns PATENT orr cn JOHN W. HOUSEBERG, 0F PITTSBURGH,PENNSYLVANIA.

LATHE TOOL-HOLDER.

Specification of Letters Patent.

cutting tool in the desired operative posi-' tion.

In tool holders of the class to which my invention relates, asheretofore constructed,a threaded member has been employed for makingdirect contact with the tool and cooperating with another threadedmember for binding or clamping the tool inthe desired.

position. Insuch constructions considerable trouble has been encounteredby reason of the threaded member, having direct contact with the tool,binding or becoming wedged in the internally cooperating threaded memberdue'to the great strain to which the externally and internally threadedmembers are subjected. In practice, it frequently happens that thethreaded tool contacting or engagingmember becomes wedged in thethreaded member in which it is inserted, thus necessitating considerablelabor to remove the threaded wedged member.

Anobject of my invention is to provide a simple and eflicient toolholder and binding or clamping means that will obviate the disadvantagesabove mentioned of tool holders employing a threaded tool engagingmember.

A further object of the present invention is to provide a tool holdercomprising an unthreaded tool engaging member or plunger and cooperatingmeans for forcing the tool engaging member into contact with the tooland maintaining it in engagement therewith.

'In the accompanying drawing, which illustrates applications of myinvention; Figure 1 is a side elevational view of a holder embodying myinvention, shown in connection with a portion of a lathe; Fig. 2, a partelevational view and a part sectional View, the section being taken onthe line II-II of Fig. 1; Fig. 3, a top plan of the form of Fig. 1; andFig. 4, a part elevational view and a part sectional view of a modifiedform of my invention shown in connection with a portion of aturret-lathe.

Referring to the drawing and first to the form of Fig. 1, 1 designatesthe body-portion of my improved tool holder, said bodyportion beingshown in the form of a toolpost. The body-portion comprises a hollowcylindrical member having a central unthreaded bore 2, an externallythreaded upper portion 3, disposed on the lower end thereof. Said and an.annular flange 4 Patented Feb. 20,1912. Application filed March 15,1911. Serial No. 614,537. 7

flange 41 is adapted to be entered in a groove 5 of a lathe portion 6.The body 1 is further provided with a laterally extending tool receivingslot'7 for a tool as 8.

Designed to cooperate with the externally threaded upper portion of thebody, I provide an internal-1y threaded cap 9 having its threads 10adapted to engage the threads 11 of the said upper portion of the body.Cap 9 is preferably of the form shown and has formed integral, therewitha nut 12.

Having a portion located within the hollow cap 9 and extendingdownwardly therefrom into the bore 2 of the body 1 is a separable memberor plunger 13. Plunger 13 as illustrated and as preferred comprises acentral cylindrical portion having on the upper end thereof an annularhead 14, and on the lower end thereof a contracted projecting member 15,the latter being designed to make contact with the cutting tool .8.

' 16 designates the usual ring or gib em loyed in tool holders of thisclass-and is designed to. support the tool 8. as clearl shown by thedrawing when the tool is clamped in operative position by the member 13.1

From the foregoing it will be noted that I dispense with a threaded toolbinding or clamping member and provide in place thereof a separableloose member free of threads androther parts liable to be injuredinclamping the tool on the ringlfi, also that said member,13 is welladapted to take care of all the strains, etc., to which it is subjectedin practice, and, further there is no liability of its becoming-bound orwedged in its inclosure.

In the form of Fig. 1, I have shown a modified form of my inventionparticularly designed to be usedin connection with a turret-lathe. Inthis latter embodiment of my invention, 17 designates a portion of aturret to which'the tool holder is secured and in this form of myinvention the bodyportion or hollow standard l is formed with a bearingmember or nut 18 and a lower threaded portion 19, the latter beingadapted to be entered in an internally threaded opening 20 of theturret. In additionto the elements just mentioned, the body is formedwith a central unthreaded bore 2 and with an externally threaded upperportion 3 corresponding With 2 and 3 of the form of Fig. l. Theremaining parts namely the member 13 and the cap 9 and the operationthereof are substantially the same as in the form of Fig. 1. The cap 9 mthis latter form is shown provided with an oil passage 21 designed. forthe purpose of introducing oil to the head of the member 13 ifdesirable.

What I claim is:

1. In a tool holder, the combination of an externally threaded member orbody having a smooth bore, an internally threaded member cooperatingwith the externally threaded member or body, and a separable unthreadedtool-olampii'ig member adapted to make direct contact With the tool,said separable member arranged in the bore of the body and projectinginto the externally threaded member.

- 2. in a tool holder, the combination or" an externally threaded memberor body having a smooth bore, an internally threaded cap cooperatingwith the externally threaded member or body, and a separable loosetoolclamping member adapted to make direct contact with the tool, saidseparable member arranged in the bore of the body and projecting intothe cap.

3.110 a tool holder, the combination of a body or standard having anupper externally threaded portion and an unthreaded bore, an internallythreaded cap cooperating with the threaded body or standard, and toolbinding means comprising a separable plunger adapted to make directcontact with the tool, said plunger arranged in the bore of the body orstandard and projecting into the cap.

4. In a lathe tool holder, the combination with a support, of anexternally threaded member or body having a central unthreaded bore, aninternally threaded cap cooperating with the externally threaded body,and a separable unthreaded tool-clamping member adapted to be moved intobinding engagement with the tool by the movement of the cap on the body.p

5. In a lathe tool holder, the combination with a support, of a body orstandard having engaging means at its lower end, an upper externallythreaded portion and a smooth bore, an internally threaded cap 00-operating with the externally threaded portion of the body, and aseparable toolclamping plunger adapted to be brought into bindingengagement with a tool by the movement of the cap on the body.

6. In a tool holder, the combination of an externally threaded member orbody having a smooth bore, an internally threaded cap cooperating withthe externally threaded member or body, and a separable tool bindingmember provided with a head, said member having a portion located in thesmooth bore of the body and its head in the cap.

In testimony whereof I aflix my signature in presence of two witnesses.

JOHN V. HOUSEBERG. Witnesses:

STELLA R. BRILHART, W. G. DOOLITTLE.

